There are a number of browsers allowing you to switch between rendering engines, with Lunascape being one of them. We've covered this browser before quite extensively, and today, the Lunascape team released the first beta of Lunascape 6 ORION, the bext version of this triple-engine web browser.

It follows the idiocy of - Hey! The more the better!
Users will go like It must be at least 3x better!.

If you want more browsers, it's a much better choice having separate clean installs. A actualized browser is a major software achievement. Now I don't see the point of handling 3 different engines just for the sake of it.

I agree. Plus slapping rendering engines in what is essentially a different browser introduces extra parameters in the equation and you can no longer be sure your page will render exactly the same way in the real browser.

Just look at Chrome and Safari: they both use Webkit yet they render differently.

And in the end, having 3 different browsers opened is not that big a deal.